Underfolio

Every trading day › 1991

The stock market on September 27, 1991

September 27, 1991, a Friday. The S&P 500 fell 0.15% to close at 385.90. Of 5,740 US stocks that traded, 1,722 rose and 1,820 fell.

The S&P 500-0.15%closed at 385.90
How big a move#20,413of 24,799 trading days since 1928
$100 in the index since$1,996price only, to September 24, 2026
Stocks that rose1,722of 5,740; 1,820 fell
Biggest companyExxon Mobilby market value that day
Last day of trading for2stocks

Biggest rises among the 500 largest companies

McKesson (MCK)+4.5%
Burlington Northern Santa Fe+4.4%
Lotus Development Corp (LOTS.)+4.1%

Biggest falls among the 500 largest companies

Centocor Inc (CNTO.)-5.8%
Tenet Healthcare (THC)-5.5%
General Dynamics (GD)-5.1%

Stock moves count dividends; the index is price only. Market values after 2024 are estimates.

‹ September 26, 1991 · Every September 27 · September 30, 1991 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.